UK’s Tidal Lagoon energy project – would be costly to build, but very cheap for 120 years thereafter

Times 28th June 2018 , Professor Chris Binnie: Greg Clark says that the Swansea tidal
lagoon was rejected as it is three times as expensive as Hinkley C, but his
calculations are suspect. The tidal lagoon would be expensive to build, but
once built it could go on for 120 years with minimal refurbishment cost.
And letter Prof Roger Kemp: The government’s rejection of the Swansea tidal
lagoon is extremely disappointing. Greg Clark says that wind energy is
cheaper, bu t it’s a false comparison: we can predict the tides years in
advance but it is difficult to look more than a week ahead with wind.https://www.thetimes.co.uk/edition/comment/adhd-and-the-rise-in-the-use-of-medication-d2bjsnc6f